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Number
13.2.5
External Multiplexing .................................................................................... 13-5
13.3
Programming the QADC64E Registers ............................................................. 13-6
13.3.1
QADC64E Module Configuration Register (QADMCR) ............................. 13-7
13.3.1.1
Low Power Stop Mode .............................................................................. 13-7
13.3.1.2
Freeze Mode .............................................................................................. 13-8
13.3.1.3
Switching Between Legacy and Enhanced Modes of Operation............... 13-9
13.3.1.4
Supervisor/Unrestricted Address Space .................................................... 13-9
13.3.2
QADC64E Interrupt Register (QADCINT)................................................. 13-11
13.3.3
Port Data Register (PORTQA) .................................................................... 13-12
13.3.4
Port Data Direction Register (DDRQA)...................................................... 13-13
13.3.5
Control Register 0 (QACR0) ....................................................................... 13-13
13.3.6
Control Register 1 (QACR1) ....................................................................... 13-14
13.3.7
Control Register 2 (QACR2) ....................................................................... 13-16
13.3.8
Status Registers (QASR0 and QASR1) ....................................................... 13-19
13.3.9
Conversion Command Word Table.............................................................. 13-26
13.3.10
Result Word Table........................................................................................ 13-30
13.4
Analog Subsystem ........................................................................................... 13-32
13.4.1
Analog-to-Digital Converter Operation....................................................... 13-32
13.4.1.1
Conversion Cycle Times.......................................................................... 13-33
13.4.1.2
Amplifier Bypass Mode Conversion Timing........................................... 13-34
13.4.2
Channel Decode and Multiplexer ................................................................ 13-35
13.4.3
Sample Buffer Amplifier ............................................................................. 13-35
13.4.4
Digital-to-Analog Converter (DAC) Array ................................................. 13-35
13.4.5
Comparator .................................................................................................. 13-35
13.4.6
Bias .............................................................................................................. 13-36
13.4.7
Successive Approximation Register ........................................................... 13-36
13.4.8
State Machine .............................................................................................. 13-36
13.5
Digital Subsystem ............................................................................................ 13-36
13.5.1
Queue Priority.............................................................................................. 13-36
13.5.2
Paused Sub-Queues...................................................................................... 13-37
13.5.3
Boundary Conditions ................................................................................... 13-39
13.5.4
Scan Modes.................................................................................................. 13-40
13.5.4.1
Disabled Mode......................................................................................... 13-40
13.5.4.2
Reserved Mode ........................................................................................ 13-41
13.5.4.3
Single-Scan Modes .................................................................................. 13-41
13.5.4.3.1
13.5.4.3.2
13.5.4.3.3
13.5.4.3.4
13.5.4.4
Continuous-Scan Modes.......................................................................... 13-44
13.5.4.4.1
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Contents
Software Initiated Single-Scan Mode.................................................. 13-42
External Trigger Single-Scan Mode .................................................... 13-42
External Gated Single-Scan Mode ...................................................... 13-43
Periodic/Interval Timer Single-Scan Mode ......................................... 13-43
Software Initiated Continuous-Scan Mode.......................................... 13-45
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